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Analog Devices Inc. LTC2452IDDB#TRPBF
- Part No.:
- LTC2452IDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2452IDDB#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,068
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Product details
Overview
LTC2452IDDB#TRPBF from Analog Devices (formerly Linear Technology) is a fully differential, 16-bit delta-sigma analog-to-digital converter with SPI interface, operating from 2.7V to 5.5V supply. It delivers ±VREF differential input range, 60 conversions per second, and <0.2µA sleep current in an 8-pin 3mm × 2mm DFN package. It is used in precision sensor signal conditioning for industrial process control and embedded environmental monitoring.
For engineers reviewing the LTC2452IDDB#TRPBF datasheet, LTC2452IDDB#TRPBF pinout, LTC2452IDDB#TRPBF application, or LTC2452IDDB#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed low-power timing behavior, calibrated accuracy specs over –40°C to +85°C, and real-world design implications of its no-latency delta-sigma architecture and proprietary input sampling scheme.
Technical Context
The LTC2452IDDB#TRPBF implements a single-chip delta-sigma modulator with integrated sinc filter, internal oscillator, and continuous on-chip offset/full-scale calibration - all transparent to the user. Its conversion time is fixed at 13–23ms (typ. 16.6ms), enabling deterministic timing in multiplexed systems without latency or settling delay.
It supports both CPOL = 0 and CPOL = 1 SPI modes, operates in three distinct states (CONVERT → SLEEP → DATA OUTPUT), and allows conversion status monitoring via SDO while CS is low and SCK is held high. Input sampling current is 50nA (typ.), with negligible DC leakage (<±10nA) between IN+ and IN–.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit signed binary output with no missing codes - guarantees monotonicity and full dynamic range utilization. |
| Differential Input Range | ±VREF, where VREF = 2.5V to VCC - enables rail-to-rail measurement relative to programmable reference. |
| Conversion Rate | 60 conversions per second (16.6ms typ.) - supports real-time monitoring of slow-varying physical signals (e.g., temperature, pressure). |
| Supply Current | 800µA during conversion, <0.2µA in sleep mode - enables battery-powered operation with µW-level average power (e.g., <50µW at 1Hz read rate from 2.7V). |
| Integral Nonlinearity | ±1 LSB (max) over –40°C to +85°C - ensures high-precision linearity without external trimming. |
| Offset Error | ±2 LSB (max) - stable over temperature due to per-conversion auto-calibration. |
| Input Sampling Current | 50 nA (typ.) - permits direct connection to high-impedance sensors or RC filters without significant loading error. |
Pinout & Package
Package: 8-lead plastic DFN (3mm × 2mm), exposed pad (Pin 9) connected to GND. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCK (Pin 1) | Serial clock input | Synchronizes serial data output; supports CPOL = 0 or 1; idle state configurable per system interface requirements. |
| GND (Pin 2) | Analog/digital ground | Common return for VCC, REF, and analog inputs; exposed pad (Pin 9) must be soldered to PCB ground plane. |
| REF (Pin 3) | Reference voltage input | Sets full-scale range (2.5V to VCC); can be tied directly to VCC for simplicity or driven externally for enhanced accuracy. |
| VCC (Pin 4) | Positive supply | 2.7V–5.5V operation; requires local decoupling: 0.1µF ceramic (closest) + 10µF ceramic in parallel to GND. |
| IN– (Pin 5) | Negative differential analog input | Paired with IN+ for true differential measurement; exhibits <±10nA DC leakage and 0.35pF sampling capacitance. |
| IN+ (Pin 6) | Positive differential analog input | Accepts input up to ±VREF; supports 31 LSB total overrange/underrange capability (e.g., measure signals slightly below GND). |
| CS (Pin 7) | Active-low chip select | Enables SDO output when low; pulls SDO to Hi-Z when high; rising edge triggers new conversion after data read. |
| SDO (Pin 8) | Three-state serial data output | Outputs 16-bit result MSB-first; indicates conversion status (HIGH = in progress, LOW = complete) when CS low and SCK high. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma architecture | One-to-one correspondence between conversion and output data - eliminates filter delay and simplifies multiplexed sensor polling. |
| Proprietary input sampling scheme | Reduces average input current by orders of magnitude vs conventional delta-sigma ADCs - enables direct RC filtering with <1 LSB error using 1kΩ/0.1µF. |
| Continuous internal calibration | Per-conversion offset and full-scale correction - maintains accuracy across –40°C to +85°C without user intervention or firmware overhead. |
| Ultra-low sleep current | <0.2µA (typ.) - extends battery life in intermittent-read applications such as wireless sensor nodes or portable instrumentation. |
| Integrated oscillator | No external crystal or timing components required - reduces BOM count, board area, and layout sensitivity. |
Applications
| Industrial Process Monitoring | Environmental Sensor Interface |
|---|---|
|
Use Scenario: Measuring thermocouple or RTD outputs in factory automation PLC modules with limited power budget and space constraints. IC Role / Device Role / Timing Role: Precision differential front-end ADC converting mV-level sensor signals into digital values for microcontroller processing. Use Value: 16-bit resolution and ±1 LSB INL ensure accurate temperature reporting; 800µA active current and <0.2µA sleep enable energy-efficient polling every 500ms. |
Use Scenario: Reading humidity and gas concentration sensors in battery-powered air quality monitors deployed indoors. IC Role / Device Role / Timing Role: Low-power analog acquisition stage digitizing conditioned analog outputs from electrochemical or capacitive sensors. Use Value: 50nA input sampling current avoids sensor loading; internal calibration maintains long-term stability without field recalibration. |
| Embedded System ADC Upgrade | Direct Temperature Measurement |
|
Use Scenario: Replacing legacy 12-bit SAR ADCs in medical diagnostic equipment to improve dynamic range and noise immunity. IC Role / Device Role / Timing Role: High-accuracy replacement ADC interfacing with existing SPI host controllers and minimal layout changes. Use Value: Pin-compatible upgrade path (8-pin DFN) with no latency, relaxed anti-aliasing, and built-in reference support reduces redesign effort. |
Use Scenario: Digitizing thermistor or diode-based temperature sensors in motor drive control boards requiring thermal protection. IC Role / Device Role / Timing Role: Differential ADC rejecting common-mode noise from switching power stages while measuring small ΔV across sensing elements. Use Value: Negligible leakage between IN+/IN– prevents measurement drift; ±VREF range accommodates wide temperature spans with single-supply operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IRUGT | 16-bit, I²C interface, 860SPS max, no internal oscillator, requires external clock or crystal. | Designed for multi-channel I²C systems; lacks sleep current spec <1µA and differential input flexibility of LTC2452IDDB#TRPBF. | Choose ADS1115IRUGT only if I²C bus integration and 4-channel mux outweigh need for ultra-low sleep power and SPI simplicity. |
| MCP3424-E/ST | 18-bit, I²C, 15SPS (18-bit) or 240SPS (12-bit), internal reference, no differential input range scaling to ±VREF. | Optimized for high-resolution static measurements; slower update rate and higher active current (250µA) limit suitability for responsive sensor polling. | Select MCP3424-E/ST when absolute 18-bit precision is mandatory and conversion latency is acceptable; avoid when sub-20ms timing or <1µA sleep is required. |
Compared with ADS1115IRUGT and MCP3424-E/ST, the LTC2452IDDB#TRPBF uniquely combines SPI simplicity, guaranteed 60SPS throughput, <0.2µA sleep current, and ±VREF differential scaling - making it optimal for compact, battery-aware, single-channel precision sensing where deterministic timing and minimal external components are critical.
Availability
LTC2452IDDB#TRPBF is available at Aetrix Electronics and suitable for industrial process control, environmental sensor interface, and embedded ADC upgrade applications requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-term production continuity.
Supply support for LTC2452IDDB#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2452IDDB#TRPBF belongs to ADI's ultra-low-power precision delta-sigma ADC family, designed specifically for space-constrained, battery-operated, and high-accuracy sensor signal acquisition in harsh environments.
FAQ
What is the operating temperature range of the LTC2452IDDB#TRPBF?
The LTC2452IDDB#TRPBF is rated for –40°C to +85°C (I-grade), validated across this full range for key parameters including integral nonlinearity (±1 LSB), offset error (±2 LSB), and supply current. This makes LTC2452IDDB#TRPBF suitable for industrial and outdoor embedded applications where ambient conditions vary widely.
Does the LTC2452IDDB#TRPBF require external components for basic operation?
No - the LTC2452IDDB#TRPBF integrates an oscillator, eliminating need for crystals or RC timing networks. Only mandatory external components are decoupling capacitors: 0.1µF ceramic (placed closest to VCC/GND pins) and 10µF ceramic in parallel. REF may be tied directly to VCC for simplest implementation.
How does the LTC2452IDDB#TRPBF achieve ultra-low input sampling current?
The LTC2452IDDB#TRPBF uses a proprietary input sampling architecture that reduces average input current to 50nA (typ.), several orders of magnitude lower than conventional delta-sigma ADCs. This enables direct connection to high-impedance sources like thermistors or RC filters without significant loading error - a key enabler for LTC2452IDDB#TRPBF in precision sensor front-ends.
Can the LTC2452IDDB#TRPBF interface with standard SPI controllers?
Yes - the LTC2452IDDB#TRPBF supports both CPOL = 0 and CPOL = 1 SPI modes and operates with standard 3-wire (SCK, CS, SDO) configuration. It outputs 16-bit signed binary data MSB-first, with CS acting as frame sync and SDO going Hi-Z when CS is high - ensuring compatibility with most microcontroller SPI peripherals without protocol translation.
What is the significance of "no latency" in the LTC2452IDDB#TRPBF datasheet?
"No latency" means the LTC2452IDDB#TRPBF produces one unambiguous 16-bit output per conversion cycle with zero filter settling delay - unlike many delta-sigma converters that output delayed or averaged results. This gives LTC2452IDDB#TRPBF deterministic timing (16.6ms conversion), essential for time-critical multiplexed sensor systems where each reading must correspond precisely to its acquisition moment.
LTC2452IDDB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 60
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DFN (3x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2452IDDB#TRPBF FAQ
1.How can I place an order for LTC2452IDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2452IDDB#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2452IDDB#TRPBF reliable?
The price and inventory of LTC2452IDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2452IDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2452IDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2452IDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2452IDDB#TRPBF?
LTC2452IDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2452IDDB#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2452IDDB#TRPBF?
For technical support, including LTC2452IDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2452IDDB#TRPBF requirements.
6.How does Aetrix verify that LTC2452IDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2452IDDB#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2452IDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2452IDDB#TRPBF?
All LTC2452IDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2452IDDB#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2452IDDB#TRPBF part is unused and in its original packaging.
Return procedure for LTC2452IDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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